The first grid-side lead-carbon battery energy storage power station of Zhejiang Province was put into operation in Changxing, Zhejiang. It gave full play to the peak shaving, frequency modulation, and emergency response of the battery energy storage system during the peak summer period, and solved the summer load power supply gap in Changxing, Huzhou. Increasing the adjustment means and adjustment capabilities of the power grid is helpful to the safe and stable operation of the power grid. At the same time, in order to increase the flexibility of Zhejiang power grid regulation, the energy storage power station not only has the AGC control capability of the whole station, but also is equipped with the AGC control function of the energy storage unit for the first time. This article focuses on introducing the AGC control strategy of the entire station and energy storage unit of the Zhejiang power grid side energy storage power station, and optimizes its AGC control strategy based on the energy efficiency of the battery. Finally, the AGC field test of the electrochemical energy storage power station is carried out. The test results prove that the AGC control strategy of this power station is feasible.